Northeast warm and humid spring corn area (most of Liaoning Province and northeastern Hebei Province)
Fertilization principle
(1) According to the soil fertilization results, determine the reasonable amount of nitrogen, phosphorus and potassium fertilizer.
(2) Nitrogen fertilizers should be applied in batches, and disposable fertilization should not be used as much as possible. The proportion and frequency of potash application should be increased in high-yield fields.
(3) Increase the intensity of straw returning to the field, increase the application of organic fertilizer, and increase the soil organic matter content.
(4) Emphasis on the application of trace elements in sulfur, zinc and the like.
(5) Fertilizer application must be combined with high-yield cultivation techniques such as deep pine and densification.
(6) The lower limit of the recommended amount of fertilization scheme for medium and high fertility soil. 2. Fertilization advice
(1) Recommended 17-17-12 (N-P2O5-K2O) or similar formula. (2) The production level is 500~600 kg/mu, the recommended dosage of formula fertilizer is 24~29 kg/mu, and the large flare period is about 14~16 kg/mu.
(3) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 29~34 kg/mu, and the large flare period is about 16~19 kg/mu.
(4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 34~39 kg/mu, and the urea is applied at 19~22 kg/mu.
(5) The production level is below 500 kg/mu, the recommended dosage of formula fertilizer is 20~24 kg/mu, and the large flare period is about 11~14 kg/mu.
This article URL: Guiding Opinions on Scientific Fertilization Technology in the Warm and Wet Spring Corn Region of Northeast China in Spring 2015
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